Brain
Encephalon
Definition
In all vertebrate and most invertebrate animals, the brain is the part of the central nervous system lodged within the neurocranium, rostrally to the other part of the nervous system: the spinal chord.
It is made of the telencephalon, the diencephalon, the mesencephalon, the metencephalon and the myelencephalon.
The telencephalon and diencephalon are the two parts of the forebrain, or prosencephalon.
The telencephalon, the diencephalon and the mesencephalon are the three parts of the archencephalon.
The metencephalon and the myelencephalon are the two parts of the rhombencephalon.
The diencephalon, mesencephalon, metencephalon and myelencephalon are the four parts of the brainstem.
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